To be honest, if you have any reason to suspect that there is a problem with the actual gimbal and or the camera and if the drone is worth anything to you then I too would be inclined to send it in to a dealer etc. who can, if necessary, re-pair the the gimbal and ......whatever....just in case that ends up being needed.
If DJI have a repair centre in Australia it might be you best bet and ask for a quote etc. before they commence any work ( I suspect they would simply send you a replacement drone and then repair yours at their leisure. (That seems to be the way they work elsewhere.) But if you use an independant repairer I would make a point of asking if they have that re-pair capability if needed.
Alternatively look out for a second hand Mavic Mini.
Mine was bought as a sacrificial scrapper, it flies and the camera works so I am not really bothered about fixing it.